package com.sky.service.impl;


import com.sky.dto.GoodsSalesDTO;
import com.sky.entity.Orders;
import com.sky.mapper.OrderMapper;
import com.sky.mapper.UserMapper;
import com.sky.service.ReportService;
import com.sky.service.WorkspaceService;
import com.sky.vo.*;
import org.apache.commons.lang3.StringUtils;
import org.apache.poi.util.StringUtil;
import org.apache.poi.xssf.usermodel.XSSFRow;
import org.apache.poi.xssf.usermodel.XSSFSheet;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.InputStream;
import java.time.LocalDate;
import java.time.LocalDateTime;
import java.time.LocalTime;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;

@Service
public class ReportServiceImpl implements ReportService {
    @Autowired
    private OrderMapper orderMapper;
    @Autowired
    private UserMapper userMapper;
    @Autowired
    private WorkspaceService workspaceService;
    /**
     * 营业额统计
     * @param begin
     * @param end
     * @return
     */
    @Override
    public TurnoverReportVO getTurnoverStatistics(LocalDate begin, LocalDate end) {

        List<LocalDate> dateList = new ArrayList<>();
        dateList.add(begin);
        while(!begin.equals(end)&&!begin.isAfter(end))
        {
            begin = begin.plusDays(1);
            dateList.add(begin);
        }
        List<Double> turnoverList = new ArrayList<>();
        for(LocalDate date :dateList){
            LocalDateTime begintime = LocalDateTime.of(date, LocalTime.MIN);
            LocalDateTime endtime = LocalDateTime.of(date, LocalTime.MAX);
            Map map = new HashMap();
            map.put("beginTime",begintime);
            map.put("endTime",endtime);
            map.put("status", Orders.COMPLETED);
            Double turnover = orderMapper.sumByMap(map);
            turnoverList.add(turnover==null?0.0:turnover);
        }
        return TurnoverReportVO.builder().dateList(StringUtils.join(dateList,",")).turnoverList(StringUtils.join(turnoverList,",")).build();
    }

    /**
     * 用户统计
     * @param begin
     * @param end
     * @return
     */
    @Override
    public UserReportVO getUserStatistics(LocalDate begin, LocalDate end) {
        List<LocalDate> dateList = new ArrayList<>();
        dateList.add(begin);
        while(!begin.equals(end)&&!begin.isAfter(end))
        {
            begin = begin.plusDays(1);
            dateList.add(begin);
        }
        List<Integer> newUserList = new ArrayList<>();
        List<Integer> totalUserList = new ArrayList<>();
        for (LocalDate date : dateList)
        {
            LocalDateTime beginTime = LocalDateTime.of(date, LocalTime.MIN);
            LocalDateTime endTime = LocalDateTime.of(date, LocalTime.MAX);
            Map map = new HashMap();
            map.put("end",endTime);
            Integer totalUser = userMapper.countByMap(map);
            map.put("begin",beginTime);
            Integer newUser = userMapper.countByMap(map);
            totalUserList.add(totalUser);
            newUserList.add(newUser);
        }
        return UserReportVO.builder().dateList(StringUtils.join(dateList,",")).newUserList(StringUtils.join(newUserList,",")).totalUserList(StringUtils.join(totalUserList,",")).build();
    }

    /**
     * 统计指定区间内的数据
     * @param begin
     * @param end
     * @return
     */
    @Override
    public OrderReportVO getOrdersStatistics(LocalDate begin, LocalDate end) {
        List<LocalDate> dateList = new ArrayList<>();
        dateList.add(begin);
        while(!begin.equals(end)&&!begin.isAfter(end))
        {
            begin = begin.plusDays(1);
            dateList.add(begin);
        }
        Integer totalOrderCount = 0;
        Integer validTotalOrderCount = 0;
        List<Integer> orderCountList = new ArrayList<>();
        List<Integer> validOrderCountList = new ArrayList<>();
        for (LocalDate date : dateList){
            LocalDateTime beginTime = LocalDateTime.of(date, LocalTime.MIN);
            LocalDateTime endTime = LocalDateTime.of(date, LocalTime.MAX);
            Integer orderCount = getOrderCount(beginTime, endTime, null);
            Integer validOrderCount = getOrderCount(beginTime, endTime, Orders.COMPLETED);
            totalOrderCount += orderCount;
            validTotalOrderCount += validOrderCount;
            orderCountList.add(orderCount);
            validOrderCountList.add(validOrderCount);
        }
//        orderCountList.stream().reduce(Integer::sum).get();
        Double orderCompletionRate = 0.0;
        if(totalOrderCount != 0){
            orderCompletionRate = validTotalOrderCount.doubleValue()/totalOrderCount;
        }
        return OrderReportVO.builder().dateList(StringUtils.join(dateList,","))
                .orderCountList(StringUtils.join(orderCountList,","))
                .validOrderCountList(StringUtils.join(validOrderCountList,","))
                .totalOrderCount(totalOrderCount)
                .validOrderCount(validTotalOrderCount)
                .orderCompletionRate(orderCompletionRate).build();
    }

    /**
     * 获取前十的商品
     * @param begin
     * @param end
     * @return
     */
    @Override
    public SalesTop10ReportVO getSalesTop10(LocalDate begin, LocalDate end) {
        LocalDateTime beginTime = LocalDateTime.of(begin, LocalTime.MIN);
        LocalDateTime endTime = LocalDateTime.of(end, LocalTime.MAX);
        List<GoodsSalesDTO> list = orderMapper.getSalesTop(beginTime, endTime);
        List<String> names = list.stream().map(GoodsSalesDTO::getName).collect(Collectors.toList());
        String namesString = StringUtils.join(names,",");
        List<Integer> numbers = list.stream().map(GoodsSalesDTO::getNumber).collect(Collectors.toList());
        String numbersString = StringUtils.join(numbers,",");
        return SalesTop10ReportVO.builder().nameList(namesString).numberList(numbersString).build();

    }

    @Override
    public void exportBusinessData(HttpServletResponse response) {
        LocalDate dataBegin = LocalDate.now().minusDays(30);
        LocalDate dataEnd = LocalDate.now().minusDays(1);
        BusinessDataVO businessDataVO = workspaceService.getBusinessData(LocalDateTime.of(dataBegin, LocalTime.MIN), LocalDateTime.of(dataEnd, LocalTime.MAX));
        //通过poi将数据写入到Excel中
        InputStream inputStream = this.getClass().getClassLoader().getResourceAsStream("template/运营数据报表模板.xlsx");
        try {
            //基于模板文件创建一个新的Excel文件
            XSSFWorkbook excel = new XSSFWorkbook(inputStream);
            //填充数据
            XSSFSheet sheet = excel.getSheet("Sheet1");
            sheet.getRow(1).getCell(1).setCellValue("时间: "+dataBegin + "至" + dataEnd);
            XSSFRow row = sheet.getRow(3);
            row.getCell(2).setCellValue(businessDataVO.getTurnover());
            row.getCell(4).setCellValue(businessDataVO.getOrderCompletionRate());
            row.getCell(6).setCellValue(businessDataVO.getNewUsers());
            row = sheet.getRow(4);
            row.getCell(2).setCellValue(businessDataVO.getValidOrderCount());
            row.getCell(4).setCellValue(businessDataVO.getUnitPrice());
            //填充明细数据
            for (int i=0;i<30;i++){
                LocalDate localDate = dataBegin.plusDays(i);
                //查询某一天的营业数据
                BusinessDataVO businessData = workspaceService.getBusinessData(LocalDateTime.of(localDate, LocalTime.MIN), LocalDateTime.of(localDate, LocalTime.MAX));
                row = sheet.getRow(7+i);
                row.getCell(1).setCellValue(localDate.toString());
                row.getCell(2).setCellValue(businessData.getTurnover());
                row.getCell(3).setCellValue(businessData.getValidOrderCount());
                row.getCell(4).setCellValue(businessData.getOrderCompletionRate());
                row.getCell(5).setCellValue(businessData.getUnitPrice());
                row.getCell(6).setCellValue(businessData.getNewUsers());
            }
            //通过数据流将Excel表格下载到客户端浏览器
            ServletOutputStream outputStream = response.getOutputStream();
            excel.write(outputStream);
            outputStream.close();
            excel.close();

        } catch (IOException e) {
            throw new RuntimeException(e);
        }

    }

    private Integer getOrderCount(LocalDateTime begin, LocalDateTime end, Integer status)
    {
        Map map = new HashMap();
        map.put("begin",begin);
        map.put("end",end);
        map.put("status",status);
        return orderMapper.countByMap(map);
    }
}
